POWER OF ATTORNEY
Know all by these presents, that the undersigned hereby constitutes and
appoints each of Chris W. Trester and Yujin Yi of Gibson, Dunn & Crutcher LLP,
with full power of substitution, the undersigned's true and lawful attorney-in-
fact to:
1 execute for and on behalf of the undersigned, in the undersigned's
capacity as a member, manager, director and/or officer, Forms 3, 4,
and 5 in accordance with Section 16(a) of the Securities Exchange Act
of 1934 and the rules thereunder;
2. do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such
Form 3, 4, or 5, complete and execute any amendment or amendments
thereto, and timely file such form with the SEC and any securities
exchange or similar authority; and
3. take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power
of Attorney shall be in such form and shall contain such terms and
conditions as such attorney-in-fact may approve in such attorney-in-
fact's discretion.
The undersigned hereby grants to such attorneys-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
any of the undersigned's responsibilities to comply with the Securities Exchange
Act of 1934 or any rule or regulation of the SEC.
This Power of Attorney shall remain in full force and effect until the
(a) the undersigned is no longer required to file Forms 3, 4, and 5 with respect
to the undersigned's holdings or (b) revocation by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23 day of October, 2020.
/s/ Peter Evan Harwin
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Peter Evan Harwin, an Individual
